Run Detail
completedhy4-previewRecorded for these videos
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Provider
openrouter
Challenge Version
v1.0
Turns
1
Duration
579.0s
Total Tokens
36,338
Input Tokens
735
Output Tokens
35,603
Reasoning Tokens
28,859
Reasoning Effort
medium
Cached Input Tokens
640
Est. Cost
$0.0891
Started
8/28/2026, 1:40:07 PM
OR Provider
Tencent
Finish Reason
stop
Generation ID
gen-1787924407-q1gLovfRx7CIf93eo6OA
Turns (1)
Turn #1
735 in35,603 out28,859 reasoning640 cached36,338 total578.9s
user
You are a game developer who ships browser demos that have to work on the first click, in front of an audience, on someone else's laptop.
Build me a Tesla Cybertruck monster-truck rally as one self-contained HTML page. A fairly small stadium, a big crowd in the stands, artificial hills and debris across the floor, and trucks slamming into each other.
Then make it match the spec below exactly. The spec is the challenge; a great-looking rally that ignores it is a miss.
The build
- One file. Everything — HTML, CSS, JS — in a single
.htmlpage. No build step. Saved to disk and double-clicked, it runs. - One external request, maximum. You may load three.js from a CDN, pinned to an exact version. That is the only network request the page is permitted to make. No second library, no font, no stylesheet, no image file, no audio file.
- Sound is optional, and if you include it, generate it with the Web Audio API. No audio assets.
- No storage. No
localStorage,sessionStorage, cookies orindexedDB. It runs in a sandboxed frame where touching them throws.
The spec
- Exactly five trucks. One the player drives, four rivals under AI. Not four, not six — five.
- Name the arena. Invent a name for the venue and show it in the HUD, on screen, during play.
- The HUD shows the arena name, a score, and a clock. Nothing else is required.
- At least three distinct obstacle types on the floor — the trucks should have something to hit besides each other.
- A crowd in the stands that is visibly a crowd, all the way round.
- Drive with the keyboard. Arrow keys or WASD. Say which in the HUD or an overlay.
- Collisions matter. Ramming a rival does something — score, a visible reaction, a wreck state. Your call, but it must be visible.
Two modes that are not the game
Both are checkable in ten seconds, which is why they are here.
#demo— if the page URL ends in#demo, the game starts with 20 seconds on the clock and the score already at 5000. This must run through the real game state, not a cosmetic overlay. Everything else behaves normally.Pfor photo mode — pressingPfreezes the action and overlays the arena name and the current score, held untilPis pressed again. The simulation stops; it does not keep playing behind the card.
Answer in exactly these sections
The pitch
One sentence: the name of your rally and what it looks like.
The game
Exactly one fenced html block containing the whole page and nothing else.
The notes
Exactly four bullets.
- Five trucks: how you kept four AI rivals from clumping into one moving wall.
- Demo mode: the line of real game state
#demosets, and why it is not an overlay. - Photo mode: what you actually stop when
Pis pressed — the render loop, the physics step, or both. - Collisions: one short paragraph on the collision model you implemented. Not what it looks like — what it computes.
assistant
The pitch
Cybertruck Rumble at Volt Dome is a neon-lit stadium rally where five angular electric trucks leap artificial hills, scatter tire-and-rubble debris, and slam each other under a packed, cheering crowd.
The game
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Cybertruck Rumble at Volt Dome</title>
<link rel="icon" href="data:,">
<style>
html,body{margin:0;padding:0;overflow:hidden;background:#050510;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#fff;}
canvas{display:block;}
#hud{position:fixed;top:12px;left:50%;transform:translateX(-50%);text-align:center;pointer-events:none;text-shadow:0 2px 6px #000;}
#arena{font-size:28px;font-weight:800;letter-spacing:2px;color:#7df9ff;}
.row{margin-top:4px;font-size:20px;font-weight:700;display:flex;gap:24px;justify-content:center;}
#controls{margin-top:6px;font-size:13px;opacity:.85;}
.overlay{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,.55);backdrop-filter:blur(2px);}
.card{background:rgba(10,10,20,.85);border:2px solid #7df9ff;border-radius:14px;padding:28px 44px;text-align:center;box-shadow:0 0 40px rgba(125,249,255,.35);}
.card div:first-child{font-size:34px;font-weight:800;color:#7df9ff;letter-spacing:1px;}
#photoScore,#finalScore{font-size:26px;font-weight:700;margin-top:10px;}
.small{margin-top:14px;font-size:13px;opacity:.8;letter-spacing:1px;}
</style>
</head>
<body>
<div id="hud">
<div id="arena">VOLT DOME</div>
<div class="row"><span id="score">SCORE 0</span><span id="clock">TIME 90</span></div>
<div id="controls">DRIVE: WASD / ARROW KEYS · P: PHOTO MODE</div>
</div>
<div id="photo" class="overlay">
<div class="card">
<div id="photoArena">VOLT DOME</div>
<div id="photoScore">SCORE 0</div>
<div class="small">PHOTO MODE — PRESS P TO RESUME</div>
</div>
</div>
<div id="gameover" class="overlay">
<div class="card">
<div>TIME UP</div>
<div id="finalScore">SCORE 0</div>
<div class="small">PRESS R TO RESTART</div>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
<script>
(function(){
const arenaName = 'VOLT DOME';
const isDemo = location.hash.toLowerCase().endsWith('#demo');
let score = 0, timeLeft = 90, gameOver = false, photoMode = false;
const scoreEl = document.getElementById('score');
const clockEl = document.getElementById('clock');
const photoOverlay = document.getElementById('photo');
const photoArena = document.getElementById('photoArena');
const photoScore = document.getElementById('photoScore');
const gameOverOverlay = document.getElementById('gameover');
const finalScore = document.getElementById('finalScore');
const scene = new THREE.Scene();
scene.background = new THREE.Color(0x050510);
scene.fog = new THREE.Fog(0x050510, 70, 220);
const camera = new THREE.PerspectiveCamera(60, innerWidth/innerHeight, 0.1, 1000);
camera.position.set(0,20,-60);
const renderer = new THREE.WebGLRenderer({antialias:true});
renderer.setPixelRatio(Math.min(devicePixelRatio,2));
renderer.setSize(innerWidth, innerHeight);
document.body.appendChild(renderer.domElement);
scene.add(new THREE.HemisphereLight(0xffffff, 0x222244, 0.9));
const dir = new THREE.DirectionalLight(0xffffff, 0.7);
dir.position.set(60,120,40);
scene.add(dir);
const floor = new THREE.Mesh(
new THREE.CircleGeometry(70, 64),
new THREE.MeshLambertMaterial({color:0x1b1b2a})
);
floor.rotation.x = -Math.PI/2;
scene.add(floor);
const stand = new THREE.Mesh(
new THREE.CylinderGeometry(90, 70, 20, 64, 1, true),
new THREE.MeshLambertMaterial({color:0x2a2a3d, side:THREE.DoubleSide})
);
stand.position.y = 10;
scene.add(stand);
const crowdRows = 14;
let crowdCount = 0;
const seatsPerRow = [];
for (let i=0;i<crowdRows;i++){
const y = 1 + i*1.3;
const radius = 70 + y;
const seats = Math.floor(2*Math.PI*radius / 1.15);
seatsPerRow.push(seats);
crowdCount += seats;
}
const crowdGeo = new THREE.BoxGeometry(0.7,1.3,0.7);
const crowdMat = new THREE.MeshLambertMaterial({color:0xffffff});
const crowd = new THREE.InstancedMesh(crowdGeo, crowdMat, crowdCount);
const dummy = new THREE.Object3D();
const cColor = new THREE.Color();
const palette = [0xff5c5c,0x5cff8f,0x5cc9ff,0xffd35c,0xd75cff,0xffffff];
let idx=0;
for (let i=0;i<crowdRows;i++){
const y = 1 + i*1.3;
const radius = 70 + y;
const seats = seatsPerRow[i];
for (let j=0;j<seats;j++){
const ang = (j/seats)*Math.PI*2 + (Math.random()-0.5)*0.02;
const x = Math.cos(ang)*radius;
const z = Math.sin(ang)*radius;
dummy.position.set(x, y+0.65, z);
dummy.rotation.set(0, Math.atan2(-x,-z) + (Math.random()-0.5)*0.4, 0);
const s = 0.8 + Math.random()*0.5;
dummy.scale.set(s,s,s);
dummy.updateMatrix();
crowd.setMatrixAt(idx, dummy.matrix);
cColor.setHex(palette[(Math.random()*palette.length)|0]);
crowd.setColorAt(idx, cColor);
idx++;
}
}
crowd.instanceMatrix.needsUpdate = true;
if (crowd.instanceColor) crowd.instanceColor.needsUpdate = true;
scene.add(crowd);
const hills = [];
const hillMat = new THREE.MeshLambertMaterial({color:0x2f6b3a});
for (let i=0;i<7;i++){
const r = 12 + Math.random()*10;
const h = 3 + Math.random()*3.5;
const ang = Math.random()*Math.PI*2;
const dist = 15 + Math.random()*40;
const x = Math.cos(ang)*dist, z = Math.sin(ang)*dist;
const mesh = new THREE.Mesh(new THREE.SphereGeometry(1, 24, 16), hillMat);
mesh.scale.set(r, h, r);
mesh.position.set(x,0,z);
scene.add(mesh);
hills.push({x:x, z:z, r:r, h:h});
}
function groundHeight(x,z){
let y=0;
for (let i=0;i<hills.length;i++){
const hl = hills[i];
const dx=x-hl.x, dz=z-hl.z;
const d2=dx*dx+dz*dz;
if (d2 < hl.r*hl.r){
const yh = hl.h*Math.sqrt(1 - d2/(hl.r*hl.r));
if (yh>y) y=yh;
}
}
return y;
}
const obstacles = [];
function addObstacle(type, x, z){
let mesh, radius, yOff=0;
if (type==='barrier'){
mesh = new THREE.Mesh(new THREE.BoxGeometry(3.5,1.4,1.2), new THREE.MeshLambertMaterial({color:0x888888}));
radius = 2.0; yOff = 0.7;
} else if (type==='tire'){
mesh = new THREE.Mesh(new THREE.CylinderGeometry(1.1,1.1,0.9,16), new THREE.MeshLambertMaterial({color:0x111111}));
radius = 1.25; yOff = 0.45;
} else {
mesh = new THREE.Mesh(new THREE.ConeGeometry(1.4,2.2,8), new THREE.MeshLambertMaterial({color:0xc8702a}));
radius = 1.4; yOff = 1.1;
}
const gy = groundHeight(x,z);
mesh.position.set(x, gy+yOff, z);
mesh.rotation.y = Math.random()*Math.PI*2;
scene.add(mesh);
obstacles.push({mesh:mesh, type:type, pos:new THREE.Vector3(x,gy+yOff,z), radius:radius});
}
for (let i=0;i<10;i++) addObstacle('barrier', (Math.random()-0.5)*100, (Math.random()-0.5)*100);
for (let i=0;i<10;i++) addObstacle('tire', (Math.random()-0.5)*100, (Math.random()-0.5)*100);
for (let i=0;i<10;i++) addObstacle('rubble', (Math.random()-0.5)*100, (Math.random()-0.5)*100);
obstacles.forEach(o=>{
const d = Math.hypot(o.pos.x,o.pos.z);
if (d>58){ o.pos.x *= 58/d; o.pos.z *= 58/d; }
const gy = groundHeight(o.pos.x,o.pos.z);
const yOff = o.type==='barrier'?0.7:o.type==='tire'?0.45:1.1;
o.pos.y = gy+yOff;
o.mesh.position.set(o.pos.x,o.pos.y,o.pos.z);
});
function makeTruck(color, isPlayer){
const shape = new THREE.Shape();
shape.moveTo(-2.3,0);
shape.lineTo(2.3,0);
shape.lineTo(1.2,0.9);
shape.lineTo(-1.0,1.1);
shape.lineTo(-2.3,0.6);
shape.lineTo(-2.3,0);
const geo = new THREE.ExtrudeGeometry(shape, {depth:1.8, bevelEnabled:false});
geo.computeBoundingBox();
geo.center();
geo.computeBoundingBox();
geo.translate(0, -geo.boundingBox.min.y, 0);
const bodyMat = new THREE.MeshLambertMaterial({color:color, emissive:0x000000});
const body = new THREE.Mesh(geo, bodyMat);
body.rotation.y = -Math.PI/2;
const group = new THREE.Group();
group.add(body);
const wheelGeo = new THREE.CylinderGeometry(0.5,0.5,0.4,12);
const wheelMat = new THREE.MeshLambertMaterial({color:0x0a0a0a});
const pivots = [];
const wx = 0.9, wz = 1.4;
[[-wx,-wz],[wx,-wz],[-wx,wz],[wx,wz]].forEach(p=>{
const pivot = new THREE.Group();
pivot.position.set(p[0],0.5,p[1]);
const w = new THREE.Mesh(wheelGeo, wheelMat);
w.rotation.z = Math.PI/2;
pivot.add(w);
group.add(pivot);
pivots.push(pivot);
});
scene.add(group);
return {
mesh:group, bodyMat:bodyMat, pivots:pivots,
pos:new THREE.Vector3(), vel:new THREE.Vector3(), yaw:0,
radius:1.8, isPlayer:isPlayer, throttle:0, steer:0,
wreckTimer:0, wreckSpin:0,
role:null, waypoints:null, wpIndex:0, roamTarget:new THREE.Vector3(), roamTimer:0, orbitAngle:Math.random()*Math.PI*2
};
}
const trucks = [];
const player = makeTruck(0x7df9ff, true);
trucks.push(player);
const rivalColors = [0xff4d4d, 0xffa64d, 0xb84dff, 0x4dff88];
for (let i=0;i<4;i++) trucks.push(makeTruck(rivalColors[i], false));
trucks[1].role='chaser';
trucks[2].role='patrol';
trucks[2].waypoints=[new THREE.Vector3(0,0,45), new THREE.Vector3(45,0,0), new THREE.Vector3(0,0,-45), new THREE.Vector3(-45,0,0)];
trucks[3].role='flanker';
trucks[4].role='roamer';
function resetTrucks(){
const angles = [-Math.PI/2, 0, Math.PI*0.4, Math.PI*0.8, Math.PI*1.2, Math.PI*1.6].slice(0,5);
for (let i=0;i<trucks.length;i++){
const t = trucks[i];
const ang = angles[i];
const rad = 35;
t.pos.set(Math.cos(ang)*rad, 0, Math.sin(ang)*rad);
t.vel.set(0,0,0);
t.yaw = Math.atan2(-t.pos.x, -t.pos.z);
t.mesh.position.copy(t.pos);
t.mesh.rotation.y = t.yaw;
t.wreckTimer=0; t.wreckSpin=0; t.throttle=0; t.steer=0;
t.bodyMat.emissive.setHex(0x000000);
t.mesh.rotation.z = 0;
if (t.role==='roamer') t.roamTimer=0;
if (t.role==='patrol') t.wpIndex=0;
}
}
function resetGame(){
score = isDemo ? 5000 : 0;
timeLeft = isDemo ? 20 : 90;
gameOver = false;
photoMode = false;
photoOverlay.style.display='none';
gameOverOverlay.style.display='none';
resetTrucks();
updateHUD();
}
function updateHUD(){
scoreEl.textContent = 'SCORE ' + score;
clockEl.textContent = 'TIME ' + Math.ceil(timeLeft);
}
const keys = {};
addEventListener('keydown', e=>{
const k = e.key.toLowerCase();
keys[k] = true;
if (k==='p') togglePhoto();
if (k==='r' && gameOver) resetGame();
if (['arrowup','arrowdown','arrowleft','arrowright',' '].includes(k)) e.preventDefault();
});
addEventListener('keyup', e=>{ keys[e.key.toLowerCase()] = false; });
function togglePhoto(){
if (gameOver) return;
photoMode = !photoMode;
if (photoMode){
photoArena.textContent = arenaName;
photoScore.textContent = 'SCORE ' + score;
photoOverlay.style.display='flex';
} else {
photoOverlay.style.display='none';
}
}
function aiUpdate(t, dt){
if (t.wreckTimer>0){ t.throttle=0; t.steer=0; return; }
let desired = new THREE.Vector3();
if (t.role==='chaser'){
desired.copy(player.pos).sub(t.pos);
} else if (t.role==='patrol'){
const wp = t.waypoints[t.wpIndex];
desired.copy(wp).sub(t.pos);
if (desired.length() < 10) t.wpIndex = (t.wpIndex+1)%t.waypoints.length;
} else if (t.role==='flanker'){
t.orbitAngle += dt*0.6;
const target = new THREE.Vector3(player.pos.x + Math.cos(t.orbitAngle)*25, 0, player.pos.z + Math.sin(t.orbitAngle)*25);
desired.copy(target).sub(t.pos);
} else {
t.roamTimer -= dt;
if (t.roamTimer<=0){
const ang = Math.random()*Math.PI*2, rad = 20+Math.random()*35;
t.roamTarget.set(Math.cos(ang)*rad,0,Math.sin(ang)*rad);
t.roamTimer = 3+Math.random()*3;
}
desired.copy(t.roamTarget).sub(t.pos);
}
desired.y=0;
if (desired.lengthSq()>0) desired.normalize();
const sep = new THREE.Vector3();
for (const o of trucks){
if (o===t) continue;
const d = t.pos.distanceTo(o.pos);
if (d < 14 && d>0){
const away = t.pos.clone().sub(o.pos); away.y=0; away.normalize().divideScalar(d/14);
sep.add(away);
}
}
for (const ob of obstacles){
const d = t.pos.distanceTo(ob.pos);
if (d < 12){
const away = t.pos.clone().sub(ob.pos); away.y=0; away.normalize().multiplyScalar((12-d)/12);
sep.add(away.multiplyScalar(1.5));
}
}
const distC = Math.hypot(t.pos.x,t.pos.z);
if (distC > 55){
const toC = new THREE.Vector3(-t.pos.x,0,-t.pos.z).normalize();
sep.add(toC.multiplyScalar((distC-55)/10));
}
const steerDir = desired.add(sep.multiplyScalar(1.6));
if (steerDir.lengthSq()>0) steerDir.normalize();
const desiredYaw = Math.atan2(steerDir.x, steerDir.z);
let diff = desiredYaw - t.yaw;
while (diff > Math.PI) diff -= Math.PI*2;
while (diff < -Math.PI) diff += Math.PI*2;
t.steer = Math.max(-1, Math.min(1, diff*2));
t.throttle = Math.abs(diff) < 1.2 ? 1 : 0.55;
}
function updateTruck(t, dt){
if (t.wreckTimer>0){
t.wreckTimer -= dt;
t.yaw += t.wreckSpin*dt;
t.vel.multiplyScalar(0.90);
t.bodyMat.emissive.setHex(0xff2200);
t.mesh.rotation.z = Math.sin(t.wreckTimer*25)*0.2;
} else {
t.bodyMat.emissive.setHex(0x000000);
t.mesh.rotation.z = 0;
}
const forward = new THREE.Vector3(Math.sin(t.yaw),0,Math.cos(t.yaw));
if (t.throttle > 0) t.vel.addScaledVector(forward, 26*t.throttle*dt);
else if (t.throttle < 0) t.vel.addScaledVector(forward, 16*t.throttle*dt);
const speed = t.vel.length();
const turn = t.steer * 2.6 * dt * Math.min(1, speed/6);
t.yaw += turn;
const fwdSpeed = t.vel.dot(forward);
const lat = t.vel.clone().addScaledVector(forward, -fwdSpeed);
lat.multiplyScalar(0.86);
t.vel.copy(forward).multiplyScalar(fwdSpeed).add(lat);
t.vel.multiplyScalar(0.995);
if (t.vel.length() > 34) t.vel.setLength(34);
t.pos.addScaledVector(t.vel, dt);
t.pos.y = groundHeight(t.pos.x, t.pos.z);
const spin = fwdSpeed*dt*2;
t.pivots.forEach(p=>p.rotation.x += spin);
t.mesh.position.copy(t.pos);
t.mesh.rotation.y = t.yaw;
}
function collide(){
for (let i=0;i<trucks.length;i++){
for (let j=i+1;j<trucks.length;j++){
const a = trucks[i], b = trucks[j];
const dx = b.pos.x - a.pos.x, dz = b.pos.z - a.pos.z;
const dist = Math.hypot(dx,dz);
const minDist = a.radius + b.radius;
if (dist < minDist && dist > 0.0001){
const nx = dx/dist, nz = dz/dist;
const overlap = minDist - dist;
a.pos.x -= nx*overlap*0.5; a.pos.z -= nz*overlap*0.5;
b.pos.x += nx*overlap*0.5; b.pos.z += nz*overlap*0.5;
const rvx = b.vel.x - a.vel.x, rvz = b.vel.z - a.vel.z;
const velAlongNormal = rvx*nx + rvz*nz;
if (velAlongNormal < 0){
const aToward = a.vel.x*nx + a.vel.z*nz;
const bToward = -(b.vel.x*nx + b.vel.z*nz);
const e = 0.45;
const jImp = -(1+e)*velAlongNormal / 2;
a.vel.x -= jImp*nx; a.vel.z -= jImp*nz;
b.vel.x += jImp*nx; b.vel.z += jImp*nz;
const approach = -velAlongNormal;
if (approach > 6){
const victim = aToward > bToward ? b : a;
const aggressor = aToward > bToward ? a : b;
victim.wreckTimer = 1.2;
victim.wreckSpin = (Math.random()-0.5)*8;
victim.vel.multiplyScalar(0.35);
if (aggressor.isPlayer && !victim.isPlayer) score += 100;
}
}
}
}
}
for (const t of trucks){
for (const ob of obstacles){
const dx = t.pos.x - ob.pos.x, dz = t.pos.z - ob.pos.z;
const dist = Math.hypot(dx,dz);
const minDist = t.radius + ob.radius;
if (dist < minDist && dist > 0.0001){
const nx = dx/dist, nz = dz/dist;
const overlap = minDist - dist;
t.pos.x += nx*overlap; t.pos.z += nz*overlap;
const vn = t.vel.x*nx + t.vel.z*nz;
if (vn < 0){
let rest = 0.4, slow = 0.85;
if (ob.type==='tire'){ rest=0.7; slow=0.92; }
else if (ob.type==='rubble'){ rest=0.3; slow=0.8; }
t.vel.x -= (1+rest)*vn*nx;
t.vel.z -= (1+rest)*vn*nz;
t.vel.multiplyScalar(slow);
if (t.isPlayer && vn < -6) score += 5;
if (vn < -12){ t.wreckTimer = 0.8; t.wreckSpin=(Math.random()-0.5)*6; }
}
}
}
const distC = Math.hypot(t.pos.x, t.pos.z);
const maxR = 70 - t.radius;
if (distC > maxR){
const nx = t.pos.x/distC, nz = t.pos.z/distC;
t.pos.x = nx*maxR; t.pos.z = nz*maxR;
const vn = t.vel.x*nx + t.vel.z*nz;
if (vn > 0){
t.vel.x -= 1.4*vn*nx;
t.vel.z -= 1.4*vn*nz;
}
}
}
}
function updateCamera(){
const forward = new THREE.Vector3(Math.sin(player.yaw),0,Math.cos(player.yaw));
const camPos = player.pos.clone().addScaledVector(forward, -13).add(new THREE.Vector3(0,7,0));
camera.position.lerp(camPos, 0.12);
const look = player.pos.clone().addScaledVector(forward, 6).add(new THREE.Vector3(0,2,0));
camera.lookAt(look);
}
function updateGame(dt){
timeLeft -= dt;
if (timeLeft <= 0){
timeLeft = 0;
gameOver = true;
finalScore.textContent = 'SCORE ' + score;
gameOverOverlay.style.display='flex';
updateHUD();
return;
}
if (player.wreckTimer>0){
player.throttle=0; player.steer=0;
} else {
let th = 0, st = 0;
if (keys['arrowup']||keys['w']) th += 1;
if (keys['arrowdown']||keys['s']) th -= 1;
if (keys['arrowleft']||keys['a']) st -= 1;
if (keys['arrowright']||keys['d']) st += 1;
player.throttle = th; player.steer = st;
}
for (let i=1;i<trucks.length;i++) aiUpdate(trucks[i], dt);
for (const t of trucks) updateTruck(t, dt);
collide();
updateCamera();
updateHUD();
}
let last = performance.now();
function animate(now){
requestAnimationFrame(animate);
const dt = Math.min((now-last)/1000, 0.05);
last = now;
if (!photoMode && !gameOver) updateGame(dt);
renderer.render(scene, camera);
}
addEventListener('resize', ()=>{
camera.aspect = innerWidth/innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(innerWidth, innerHeight);
});
resetGame();
animate(performance.now());
})();
</script>
</body>
</html>
The notes
- Five trucks: Each of the four rivals runs a different steering role — one chases the player, one patrols a fixed four-point loop, one orbits the player at a radius, one roams to random points — and every rival adds a separation vector away from any truck within 14 units (plus obstacle and wall avoidance), so they aim for different places and repel each other instead of forming a wall.
- Demo mode: It sets the real
scoreandtimeLeftvariables (score = isDemo ? 5000 : 0; timeLeft = isDemo ? 20 : 90;) that the countdown, HUD and game-over check all read, so the 20-second clock and 5000 score are live match state, not a cosmetic overlay. - Photo mode: Pressing
Pstops the physics step and every game-state update (timer, AI, input integration, collisions, camera follow) but keeps the render loop running, so the frozen frame stays on screen behind the DOM card. - Collisions: The model is 2D circle collisions in the XZ plane: for each overlapping pair it computes the center delta, separates them along the collision normal, and applies an impulse along that normal from the relative approach speed with restitution, then compares each truck’s pre-impact closing speed along the normal to decide the aggressor; if the player is the aggressor and closing speed is high, the victim is put into a wreck state and score is awarded, while obstacles are static circles with type-specific restitution/slow and a small score, and the arena wall is a circular boundary that reflects trucks.
Attachments
tencent/hy4-preview — page